Supports the following standards: ASTM D422, ASTM D7928, AASHTO T88 A complete Analysis Set for determining the distribution of soil particles smaller than 200 (0.075mm) featuring our H-4239A Hydrometer Jar Bath. The Humboldt Hydrometer Water Bath is designed to provide a 68°F (20°C) ambient temperature throughout the unit by using a microprocessor-based temperature control with integral heater and chiller. The control processor in the H-4239A provides a consistant bath temperature of 68°F (20°C) accurate to within 0.1% of input span ±1°F. Temperature range can be set between 50°F (10°C) and 120°F (49°C). Complies with ASTM D422; ASTM D7928; AASHTO T88. Shipping wt. 225 lbs. (102kg) Set Includes: (1) H-4239A Hydrometer Jar Bath (1) H-4241 Soil Hydrometer A (1) H-4242 Soil Hydrometer B (8) H-4244 Hydrometer Jars (1) H-4260A Soil Dispersion Mixer (8) H-4244RS Stoppers for Hydrometer Jar (1) H-4247 Sodium Hexametaphosphate, 1 lb. (0.5kg)